Center-top door pivot mounting mechanism

ABSTRACT

A mechanism for control of the operation of top frame pivots for center mounting doors wherein there is provided an upper frame member with a vertical pivot pin movable in a sleeve serving as a dowel to aid in positioning and securing the mechanism. One end of a lever extends into a lateral recess in the pivot pin, and the lever is mounted on a transverse shaft for oscillation through a central area and for reciprocation between a position in which the lever engages a vertical pin wall to prevent movement through said central area and a position in which it may be moved through the central area.

United States Patent [191 Ferguson Jan. 22, 1974 [76] Inventor: Paul R. Ferguson, 340 Industrial Ave., Cheshire, Conn. 06410 221 Filed: Nov. 15,1971

21 Appl.No.: 198,625

Primary ExaminerPaul R. Gilliam Attorney, Agent, or FirmRobert Irving Williams A mechanism for control of the operation of top frame pivots for center mounting doors wherein there is provided an upper frame member with a vertical pivot pin movable in a sleeve serving as a dowel to aid in positioning and securing the mechanism. One end of a lever extends into a lateral recess in the pivot pin, and the lever is mounted on a transverse shaft for 0scillation through a central area and for reciprocation between a position in which the lever engages a vertical pin wall to prevent movement through said central area and a position in which it may be moved through the central area.

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CENTER-TOP DOOR PIVOT MOUNTING MECHANISM BACKGROUND OF THE INVENTION Doors subject to control by spring closing and hydraulic cushioning as well as doors actuated by power subject their mounting means to reciprocating forces that tend to loosen the fastening means Center pivoted doors commonly mounted at the top to rotate about a pin which must be axially slideable in a guideway to make door placement and removal possible. The essential looseness, or clearance between pin and guideway permits wear-producing oscillation of the pin. Such pivot pins are commonly operated by a lever the extremity of which extends into a lateral recess in the pin and moves through a vertically extending arc whereas the pin is mounted for straight line vertical movement to provide for extension and retraction. In general, operating levers for center-pivoted doors, especially when the mechanism is corroded, tend to bind, strain or break themselves or their associated mechanism, or to permit looseness of mounting thereof, because they are commonly operated by means of an end which extends into a lateral recess in the pin but is movable through a vertically extending arc whereas the pin is mounted for vertical movement when the door is to be put in place or removed.

SUMMARY With the foregoing and other considerations in view, the present invention contemplates the provision of a degree of freedom in the movement of the leverage mechanism in combination with effective binding action when the pin is in its upper and lower positions. This not only avoids the above mentioned difficulties, but also facilitates the positioning, removal, or adjustment of a center-pivoted door with a minimum amount of effort and labor.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top view of one form of pivot set exemplifying one form of mechanism embodying the invention;

FIG. 2 is a section along the line 22 in FIG. 1 showing the lever in pin-retracted position;

FIG. 3 is a similar view showing a door in place and the locking screw in position to apply the necessary locking force;

FIG. 4 is a similar view showing the lever in pin projecting position;

FIG. 5 is a cross section along the line 5-5 of FIG.

FIG. 6 is a view similar to FIG. 2 showing another form of mechanism;

FIG. 7 is a similar view showing still another form of mechanism; and

FIG. 8 is a detail thereof.

DESCRIPTION OF PREFERRED EMBODIMENTS In the exemplified construction in FIGS. 1-5 there is provided a tubular frame 10 of door frame header 11 which is rectangular in cross section, and in the lower side of which is an opening 12 and a hollow upright 13 serving as a guideway for a vertical pin 16 slidable between a retracted position shown in FIG. 2 and an operati ve projecting position shown in FIG. 4. Preferably the guideway includes, in its lower portion, a sleeve 14 projecting downwardly of the element 13 and projecting inwardly of the element 13 sufficiently to enable it to serve as a positioning dowel in the interior of the element 13. The pivot pin is formed with a lateral recess 18 in one side thereof and into this recess extends the end 19 of a lever 20 pivoted on a horizontal shaft 22 and movable in a slot 23 in the sleeve 14. The shaft 22 is rotatably mounted in a rocker 24 which in turn is rockably mounted on a horizontal shaft 26 carried on the frame 10. A pair of springs 27 and 28 positioned loosely on the shaft 22 exert downward pressure on the lever 20. It is to be noted that, in the position of FIG. 2, the end 19 of the lever lies close to the end wall 30 of the recess 18 and above the axis of shaft 22 in this position, so that the springs cannot move the pin downwardly without a releasing movement of the shaft 22 and the lever 20, in the present instance a clockwise movement of the shaft 22 on the axis of shaft 26 and movement of the lever 20 to the right sufficiently to permits its end 19 to move downwardly. As will be seen in FIG. 2, however, such movements are prevented by a screw 32 when in position shown in FIG. 2. When, however, as shown in FIG. 3, a door 34 having a pinreceiving bearing 36 has been placed more or less transversely below the frame 10 with the bearing 36 in the general vicinity of the bottom of sleeve 14, and when the screw 32 has been lowered to its position in FIG. 3 or below, the springs 27 and 28 will be free to move the lever end 19 and the pin 16 downwardly, as soon as the installer brings the bearing 36 precisely into pin-receiving position, when the action of the springs 27 and 28 on lever 20 will press the pin into bearing 36. The downward movement of the end 19 of the lever 20 is limited by the bottom of slot 23. The screw 32 may then be turned to the position of FIG. 4 which causes the end 19 of the lever to engage the wall 30 of the recess 18 which, because of the binding action on the end 19 against the wall 30, will resist any force tending to raise the pin 16 and the lever end 19, and will assure against the raising of the pin 16, as well as against undesired oscillation about its axis as well as wear-producing motion normal to its axis. A plate 38 is then screwed into place. The plate 38 provides an opening 40 into which a lug 42 on the lever extends with the left hand side of the lug close to the right hand side of the opening 40 so that the plate cannot be put in place when the lug is in the position of FIGS. 2 and 3; thus assuring that the screw 32 must be in locking position before the plate is screwed on, and serving as a sure reminder to the installer that the screw must be so positioned.

When the plate 38 is removed the screw 32 unscrewed, the lever may be returned to the position of FIG. 2 by a tool inserted in the slot '44 of the lever.

In the construction exemplified in FIG. 6 there is provided a frame 10a, a sleeve 14a and a pin 16a having a recess 18a all generally similar to similarly numbered elements in FIG. 2. Extending into the recess 18a is the end 19a of a lever 50 on which a spring 27a presses downwardly. The lever 50 is formed with an elongated trunion 52 through which a shaft 22a extends. Movement of the lever 50 longitudinally is caused when a screw 54 is advanced, prevented when the screw 54 remains in advanced position, and permitted when the screw 54 is retracted; the operation being carried out by a member 56 pivoted at 58 and having a surface 59 against which the screw 54 bears. Member 56 is also formed with a cam surface 60 adapted to bear against a surface 62 on the lever rearwardly of the rear end of trunion 52.

In the construction exemplified in FIGS. 7 and 8 the lever operating spring is omitted, but there are provided a frame 10b and pin 1612 having a recess 18b receiving the end 19b of a lever 70. The lever 70 is operated in both directions by a locking screw 72 threadedly extending generally vertically into a boss 74 on the lever. The lever turns on a shaft 75 in an angularlyelongated trunion 76. By pulling down the boss the lever is released utilizing the cam action of the angular trunion, made to operate the pin, and relocked.

I claim:

1. Mounting mechanism for top-pivoting a centerpivoted door, comprising a top frame structure, a vertically movable pivot pin having a lateral recess therein, a pivoted lever having an end extending into said recess for imparting vertical movement to said pin, means including pivot means for mounting said lever for pivotal movement and for movement of the lever towards said pin to bring said end of the lever into locking engagement with said pin and away from said pin to release the pin for vertical movement, a second pivoted member operatively associated with the first-mentioned means and movable in one direction for causing said movement of said lever towards said pin to lock the pin and in an opposite direction to release it, means for pivoting said second member, one of said pivot means being movable toward and away from said pin and the aforesaid pivoted members being movable with respect to each other, and means for moving said operatively associated member into and holding it in said locking position and for releasing it when desired.

2. Mechanism as in claim 1 wherein said operatively associated member is in the form of a rocker pivotally mounted on said frame and carrying the pivot means for the lever on a portion of the rocker having a movement with a horizontal component.

3. Mounting mechanism for top-pivoting a centerpivoted door, comprising a top frame structure, a vertically movable pivot pin having a lateral recess therein, a pivoted lever having an end extending into said recess for imparting vertical movement to said pin, means including pivot means for mounting said lever for pivotal movement and for movement of the lever towards said pin to bring said end of the lever into locking engagement with said pin and away from said pin to release the pin for vertical movement, a second pivoted member operatively associated with the first-mentioned means and movable in one direction for causing said movement of said lever towards said pin to lock the pin and in an opposite direction to release it, means for pivoting said second member, said lever being formed with an elongated slot receiving the first mentioned pivot means, the aforesaid pivoted members being movable with respect to each other, and means including said slot for moving said operatively associated member into and holding it in said locking position and for releasing it when desired.

4. Mounting mechanism for top-pivoting a centerpivoted door, comprising a top frame structure, a vertically movable pivot pin having a lateral recess therein, a pivoted lever having an end extending into said recess for imparting vertical movement to said pin, means including pivot means for mounting said lever for pivotal movement and for movement of the lever towards said pin to bring said end of the lever into locking engagement with said pin and away from said pin to release the pin for vertical movement, said lever being formed with an elongated slot receiving said pivot means and having a horizontal component, and means including said slot for moving said lever into and holding it in said locking position and for releasing it when desired 5. Mechanism as in claim 3 wherein the firstmentioned pivot means is fixed and said lever is formed with a slot having a horizontal component and through which the first pivot means extends.

6. Mechanism as in claim 4 wherein the lastmentioned means includes means for adjusting said pivot means in said slot.

7. Mechanism as in claim 3 wherein the second pivoted member is a camming means.

8. Mechanism as in claim 1 wherein said pin is mounted in a hollow vertical guiding member and there is provided a sleeve within the lower part of said guiding member and projecting downwardly of said guiding member and serving as a locating dowel for said pin.

9. Mechanism as in claim 4 wherein said pin is mounted in a hollow vertical guiding member and there is provided a sleeve within the lower part of said guiding member and projecting downwardly of said guiding member and serving as a locating dowel for said pin.

1: =l s l 

1. Mounting mechanism for top-pivoting a center-pivoted door, comprising a top frame structure, a vertically movable pivot pin having a lateral recess therein, a pivoted lever having an end extending into said recess for imparting vertical movement to said pin, means including pivot means for mounting said lever for pivotal movement and for movement of the lever towards said pin to bring said end of the lever into locking engagement with said pin and away from said pin to release the pin for vertical movement, a second pivoted member operatively associated with the first-mentioned means and movable in one direction for causing said movement of said lever towards said pin to lock the pin and in an opposite direction to release it, means for pivoting said second member, one of said pivot means being movable toward and away from said pin and the aforesaid pivoted members being movable with respect to each other, and means for moving said operatively associated member into and holding it in said locking position and for releasing it when desired.
 2. Mechanism as in claim 1 wherein said operatively associated member is in the form of a rocker pivotally mounted on said frame and carrying the pivot means for the lever on a portion of the rocker having a movement with a horizontal component.
 3. Mounting mechanism for top-pivoting a center-pivoted door, comprising a top frame structure, a vertically movable pivot pin having a lateral recess therein, a pivoted lever having an end extending into said recess for imparting vertical movement to said pin, means including pivot means for mounting said lever for pivotal movement and for movement of the lever towards said pin to bring said end of the lever into locking engagement with said pin and away from said pin to release the pin for vertical movement, a second pivoted member operatively associated with the first-mentioned means and movable in one direction for causing said movement of said lever towards said pin to lock the pin and in an opposite direction to release it, means for pivoting said second member, said lever being formed with an elongated slot receiving the first mentioned pivot means, the aforesaid pivoted members being movable with respect to each other, and means including said slot for moving said operatively associated member into and holding it in said locking position and for releasing it when desired.
 4. Mounting mechanism for top-pivoting a center-pivoted door, comprising a top frame structure, a vertically movable pivot pin having a lateral recess therein, a pivoted lever having an end extending into said recess for imparting vertical movement to said pin, means including pivot means for mounting said lever for pivotal movement and for movement of the lever towards said pin to bring said end of the lever into locking engagement with said pin and away from said pin to release the pin for vertical movement, said lever being formed with an elongated slot receiving said pivot means and having a horizontal component, and means including said slot for moving said lever into and holding it in said locking position and for releasing it when desired
 5. Mechanism as in claim 3 wherein the first-mentioned pivot means is fixed and said lever is formed with a slot having a horizontal component and through which the first pivot means extends.
 6. Mechanism as in claim 4 wherein the last-mentioned means includes means for adjusted said pivot means in said slot.
 7. Mechanism as in claim 3 wherein the second pivoted member is a camming means.
 8. Mechanism as in claim 1 wherein said pin is mounted in a hollow vertical guiding member and there is provided a sleeve within the lower part of said guiding member and projecting downwardly of said guiding member and seRving as a locating dowel for said pin.
 9. Mechanism as in claim 4 wherein said pin is mounted in a hollow vertical guiding member and there is provided a sleeve within the lower part of said guiding member and projecting downwardly of said guiding member and serving as a locating dowel for said pin. 